diff options
Diffstat (limited to 'bsd-core')
| -rw-r--r-- | bsd-core/drmP.h | 1 | ||||
| -rw-r--r-- | bsd-core/drm_irq.c | 58 |
2 files changed, 36 insertions, 23 deletions
diff --git a/bsd-core/drmP.h b/bsd-core/drmP.h index b0a23e9c..2f2ffb3c 100644 --- a/bsd-core/drmP.h +++ b/bsd-core/drmP.h @@ -787,6 +787,7 @@ struct drm_device { atomic_t context_flag; /* Context swapping flag */ int last_context; /* Last current context */ + int vblank_disable_allowed; wait_queue_head_t *vbl_queue; /* vblank wait queue */ atomic_t *_vblank_count; /* number of VBLANK interrupts */ /* (driver must alloc the right number of counters) */ diff --git a/bsd-core/drm_irq.c b/bsd-core/drm_irq.c index a066cfc9..4b515ad8 100644 --- a/bsd-core/drm_irq.c +++ b/bsd-core/drm_irq.c @@ -81,9 +81,15 @@ static void vblank_disable_fn(void *arg) } callout_deactivate(&dev->vblank_disable_timer); + if (!dev->vblank_disable_allowed) + return; + for (i = 0; i < dev->num_crtcs; i++) { if (atomic_read(&dev->vblank_refcount[i]) == 0 && dev->vblank_enabled[i]) { + DRM_DEBUG("disabling vblank on crtc %d\n", i); + dev->last_vblank[i] = + dev->driver.get_vblank_counter(dev, i); dev->driver.disable_vblank(dev, i); dev->vblank_enabled[i] = 0; } @@ -181,6 +187,8 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs) atomic_set(&dev->vblank_refcount[i], 0); } + dev->vblank_disable_allowed = 0; + return 0; err: @@ -334,7 +342,6 @@ u32 drm_vblank_count(struct drm_device *dev, int crtc) void drm_update_vblank_count(struct drm_device *dev, int crtc) { - unsigned long irqflags; u32 cur_vblank, diff; if (dev->vblank_suspend[crtc]) @@ -348,7 +355,6 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc) * a long time. */ cur_vblank = dev->driver.get_vblank_counter(dev, crtc); - DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); if (cur_vblank < dev->last_vblank[crtc]) { if (cur_vblank == dev->last_vblank[crtc] - 1) { diff = 0; @@ -364,7 +370,9 @@ void drm_update_vblank_count(struct drm_device *dev, int crtc) diff = cur_vblank - dev->last_vblank[crtc]; } dev->last_vblank[crtc] = cur_vblank; - DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); + + DRM_DEBUG("enabling vblank interrupts on crtc %d, missed %d\n", + crtc, diff); atomic_add(diff, &dev->_vblank_count[crtc]); } @@ -382,8 +390,10 @@ int drm_vblank_get(struct drm_device *dev, int crtc) ret = dev->driver.enable_vblank(dev, crtc); if (ret) atomic_dec(&dev->vblank_refcount[crtc]); - else + else { dev->vblank_enabled[crtc] = 1; + drm_update_vblank_count(dev, crtc); + } } DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); @@ -407,6 +417,8 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct drm_modeset_ctl *modeset = data; + unsigned long irqflags; + u32 new, diff; int crtc, ret = 0; crtc = modeset->crtc; @@ -417,27 +429,28 @@ int drm_modeset_ctl(struct drm_device *dev, void *data, switch (modeset->cmd) { case _DRM_PRE_MODESET: - dev->vblank_premodeset[crtc] = - dev->driver.get_vblank_counter(dev, crtc); - dev->vblank_suspend[crtc] = 1; + DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); + dev->vblank_disable_allowed = 1; + if (!dev->vblank_enabled[crtc]) { + dev->vblank_premodeset[crtc] = + dev->driver.get_vblank_counter(dev, crtc); + dev->vblank_suspend[crtc] = 1; + } + DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); break; case _DRM_POST_MODESET: - if (dev->vblank_suspend[crtc]) { - u32 new = dev->driver.get_vblank_counter(dev, crtc); - - /* Compensate for spurious wraparound */ - if (new < dev->vblank_premodeset[crtc]) { - atomic_sub(dev->max_vblank_count + new - - dev->vblank_premodeset[crtc], - &dev->_vblank_count[crtc]); - DRM_DEBUG("vblank_premodeset[%d]=0x%x, new=0x%x" - " => _vblank_count[%d]-=0x%x\n", crtc, - dev->vblank_premodeset[crtc], new, - crtc, dev->max_vblank_count + new - - dev->vblank_premodeset[crtc]); - } + DRM_SPINLOCK_IRQSAVE(&dev->vbl_lock, irqflags); + dev->vblank_disable_allowed = 1; + new = dev->driver.get_vblank_counter(dev, crtc); + if (dev->vblank_suspend[crtc] && !dev->vblank_enabled[crtc]) { + if (new > dev->vblank_premodeset[crtc]) + diff = dev->vblank_premodeset[crtc] - new; + else + diff = new; + atomic_add(diff, &dev->_vblank_count[crtc]); } dev->vblank_suspend[crtc] = 0; + DRM_SPINUNLOCK_IRQRESTORE(&dev->vbl_lock, irqflags); break; default: ret = EINVAL; @@ -471,7 +484,6 @@ int drm_wait_vblank(struct drm_device *dev, void *data, struct drm_file *file_pr if (crtc >= dev->num_crtcs) return EINVAL; - drm_update_vblank_count(dev, crtc); seq = drm_vblank_count(dev, crtc); switch (vblwait->request.type & _DRM_VBLANK_TYPES_MASK) { @@ -569,7 +581,7 @@ void drm_vbl_send_signals(struct drm_device *dev, int crtc ) void drm_handle_vblank(struct drm_device *dev, int crtc) { - drm_update_vblank_count(dev, crtc); + atomic_inc(&dev->_vblank_count[crtc]); DRM_WAKEUP(&dev->vbl_queue[crtc]); drm_vbl_send_signals(dev, crtc); } |